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| author | Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> | 2013-06-07 16:51:23 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-06-20 23:33:20 +0200 |
| commit | 885032b91042288f98d3888c2aaf3a108d348d5c (patch) | |
| tree | 3f51f6eca75275a2be2a2cf19be546bc6ec27855 /arch/x86/kvm/vmx.c | |
| parent | 87d41fb4da6467622b7a87fd6afe8071abab6dae (diff) | |
| download | lwn-885032b91042288f98d3888c2aaf3a108d348d5c.tar.gz lwn-885032b91042288f98d3888c2aaf3a108d348d5c.zip | |
KVM: MMU: retain more available bits on mmio spte
Let mmio spte only use bit62 and bit63 on upper 32 bits, then bit 52 ~ bit 61
can be used for other purposes
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 260a91939555..78ee123de7a3 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4176,10 +4176,10 @@ static void ept_set_mmio_spte_mask(void) /* * EPT Misconfigurations can be generated if the value of bits 2:0 * of an EPT paging-structure entry is 110b (write/execute). - * Also, magic bits (0xffull << 49) is set to quickly identify mmio + * Also, magic bits (0x3ull << 62) is set to quickly identify mmio * spte. */ - kvm_mmu_set_mmio_spte_mask(0xffull << 49 | 0x6ull); + kvm_mmu_set_mmio_spte_mask((0x3ull << 62) | 0x6ull); } /* |